.container {
  width: 100%;
  height: 100%;
}

.header {
  line-height: 50px;
  width: 100%;
  height: 50px;
  text-align: center;
  color: #ffffff;
  background: #696264;
}

.content {
  height: 2000px;
}

.banner-container {
  width: 100%;
}

.banner {
  display: block;
  width: 100%;
  height: 600px;
  margin: 0 auto;
}

.navigation-container {
  line-height: 60px;
  height: 60px;
}

.navigation {
  display: block;
  float: right;
  list-style: none;
}

.navigation > li {
  display: block;
  float: left;
  margin: 0 15px;
}

.navigation > li:last-child {
  margin-right: 100px;
}

.paragraph-container {
  width: 100%;
  padding: 0 200px;
  border-bottom: 1px solid #ccc;
  box-sizing: border-box;
}

.paragraph {
  font-size: 16px;
  margin: 40px 0;
  padding: 20px 0;
  color: #1c1c1c;
  border-bottom: 1px solid #eee;
}

.paragraph:last-child {
  border: 0;
}

.gradient-btn-container {
  width: 100%;
  margin: 100px 0;
  text-align: center;
}

.gradient-btn {
  font-size: 16px;
  padding: 10px 30px;
  border: 0;
  border-radius: 4px;
  color: #ffffff;
  background: linear-gradient(to right, #86ff00, #ff0300, #7700ee, #00eeee);
  background-size: 500% 500%;
  cursor: pointer;
  animation: gradient 15s ease reverse infinite;
}

.fixed-ad,
.another-fixed-ad {
  line-height: 100px;
  position: fixed;
  width: 300px;
  height: 120px;
  text-align: center;
  color: #ffffff;
}

.footer {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 300px;
  background: #242631;
}

.footer-btn {
  font-size: 16px;
  padding: 10px 30px;
  border: 1px solid #ff4559;
  border-radius: 4px;
  color: #ff4559;
  background: transparent;
  cursor: pointer;
  transition: all 0.3s ease;
}

.footer-btn:hover {
  color: #ffffff;
  background: #ff4559;
}

@keyframes gradient {
  0% {
    background-position: 0 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0 50%;
  }
}
